package thinkingInJava.containers.Ref;

//: containers/Stacks.java
//Demonstration of Stack Class.
import java.util.*;
import static thinkingInJava.YTool.YPrint.*;

enum Month { JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE,
JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER }

public class Stacks {
public static void main(String[] args) {
 java.util.Stack<String> stack = new java.util.Stack<String>();
 for(Month m : Month.values())
   stack.push(m.toString());
 print("stack = " + stack);
 // Treating a stack as a Vector:
 stack.addElement("The last line");
 print("element 5 = " + stack.elementAt(5));
 print("popping elements:");
 while(!stack.empty())
   printnb(stack.pop() + " ");

 // Using a LinkedList as a Stack:
 LinkedList<String> lstack = new LinkedList<String>();
 for(Month m : Month.values())
   lstack.addFirst(m.toString());
 print("lstack = " + lstack);
 while(!lstack.isEmpty())
   printnb(lstack.removeFirst() + " ");

 // Using the Stack class from
 // the Holding Your Objects Chapter:
 thinkingInJava.containers.Ref.Stack<String> stack2 =
   new thinkingInJava.containers.Ref.Stack<String>();
 for(Month m : Month.values())
   stack2.push(m.toString());
 print("stack2 = " + stack2);
 while(!stack2.empty())
   printnb(stack2.pop() + " ");

}
} /* Output:
stack = [JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER]
element 5 = JUNE
popping elements:
The last line NOVEMBER OCTOBER SEPTEMBER AUGUST JULY JUNE MAY APRIL MARCH FEBRUARY JANUARY lstack = [NOVEMBER, OCTOBER, SEPTEMBER, AUGUST, JULY, JUNE, MAY, APRIL, MARCH, FEBRUARY, JANUARY]
NOVEMBER OCTOBER SEPTEMBER AUGUST JULY JUNE MAY APRIL MARCH FEBRUARY JANUARY stack2 = [NOVEMBER, OCTOBER, SEPTEMBER, AUGUST, JULY, JUNE, MAY, APRIL, MARCH, FEBRUARY, JANUARY]
NOVEMBER OCTOBER SEPTEMBER AUGUST JULY JUNE MAY APRIL MARCH FEBRUARY JANUARY
*///:~
